1864287685 has 16 divisors (see below), whose sum is σ = 2422707840. Its totient is φ = 1369005120.

The previous prime is 1864287679. The next prime is 1864287697. The reversal of 1864287685 is 5867824681.

It is not a de Polignac number, because 1864287685 - 2⁵ = 1864287653 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68481 + ... + 91750.

It is an arithmetic number, because the mean of its divisors is an integer number (151419240).

Almost surely, 2^1864287685 is an apocalyptic number.

It is an amenable number.

1864287685 is a deficient number, since it is larger than the sum of its proper divisors (558420155).

1864287685 is a wasteful number, since it uses less digits than its factorization.

1864287685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160428.

The product of its digits is 5160960, while the sum is 55.

The square root of 1864287685 is about 43177.3978488746. The cubic root of 1864287685 is about 1230.7532093212.

The spelling of 1864287685 in words is "one billion, eight hundred sixty-four million, two hundred eighty-seven thousand, six hundred eighty-five".